Very nice Sentinel. I love these guys, and have a ton more than I will ever field in a standard game.
Two comments, first, I would drill out the barrel of the heavy flamer. Secondly, your hydraulics on the legs are too shiny and new. Add some browns and greens to represent fluid leakage/buildup, and some grime. Look at any vehicle with hydraulics, they are always dirt, mud, and dust magnets!
Nice build, keep it coming!
Chris
A veteran is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "up to and including my life."